A flask has two sides separated by a selectively permeable (semi-permeable) membrane. I place a 10% sucrose/water solution in side A and a 20% sucrose/water solution in side B. Please predict in which direction most of the water will move via osmosis.
from Side A to side B
from Side B to side A
there will be no movement of water
water will move from B to A and A to B at equilibrium
The Correct Answer is A
A. from Side A to Side B: Osmosis is the movement of water from a region of lower solute concentration (10%) to one of higher solute concentration (20%) to equalize the concentration.
B. from Side B to Side A: This would occur only if Side A had a higher solute concentration, which it doesn't.
C. there will be no movement of water: There’s a concentration gradient, so water will move.
D. water will move from B to A and A to B at equilibrium: Equilibrium implies equal concentrations, which is not the case initially.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. hydrochloric acid (HCl): This is an inorganic acid, lacks carbon-hydrogen bonds.
B. salt (NaCl): Inorganic ionic compound, no carbon present.
C. sucrose (C₁₂H₂₂O₁₁): Sucrose is a carbohydrate (disaccharide), which contains carbon, hydrogen, and oxygen-hallmarks of organic compounds.
D. water (H₂O): Water is essential but inorganic-it contains no carbon.
Correct Answer is C
Explanation
A. flagella: Flagella are for cell movement (e.g., sperm), not absorption.
B. cilia: Cilia move fluid or particles across cell surfaces (e.g., respiratory tract), not primarily for absorption.
C. microvilli: Microvilli are tiny projections on intestinal cells that increase surface area for nutrient absorption.
D. spindle fibers: Spindle fibers are used during cell division (mitosis), not absorption.
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